One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,3,4)(6,9)(10,12)(15,21)(16,23)(18,24)(19,26)(30,32)(31,37)(33,41)(42,44)(13,14,17,20)(15,18,21,24)(16,19,23,26)(22,25,27,28)(29,30,34,32)(31,38,37,35)(33,36,41,40)(39,44,43,42)(5,6)(7,10)(8,9)(11,12)(13,14)(15,18)(16,19)(17,20)(21,24)(22,25)(23,26)(27,28)(29,31,34,37)(30,35,32,38)(33,39,41,43)(36,42,40,44)(1,2)(3,4)(5,7,8,11)(6,10,9,12)(13,15)(14,18)(16,22)(17,21)(19,25)(20,24)(23,27)(26,28)(29,32,34,30)(31,38,37,35)(33,36,41,40)(39,42,43,44)(13,16,17,23)(14,19,20,26)(15,22,21,27)(18,25,24,28)(29,33)(30,36)(31,39)(32,40)(34,41)(35,42)(37,43)(38,44)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.